Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:01 2012

Optimize a model with 150 rows, 70 columns and 300 nonzeros
Presolve removed 27 rows and 4 columns
Presolve time: 0.00s
Presolved: 123 rows, 66 columns, 260 nonzeros
Variable types: 0 continuous, 66 integer (66 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.300000e+01, 83 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   33.00000    0   50   30.00000   33.00000  10.0%     -    0s
H    0     0                      31.0000000   33.00000  6.45%     -    0s
     0     0   32.22222    0   54   31.00000   32.22222  3.94%     -    0s
     0     0     cutoff    0        31.00000   31.99997  3.23%     -    0s

Cutting planes:
  Gomory: 1
  Clique: 3
  Zero half: 16

Explored 0 nodes (134 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%